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Polymers 2015, 7(4), 747-759; doi:10.3390/polym7040747

Characterization of Novel Castor Oil-Based Polyurethane Polymer Electrolytes

1
Institute of Graduate Studies, University of Malaya, 50603 Kuala Lumpur, Malaysia
2
School of Chemical Sciences and Food Technology, Faculty of Science & Technology, Universiti Kebangsaan Malaysia, 46300 Bangi, Selangor, Malaysia
3
Center for Foundation Studies in Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
*
Authors to whom correspondence should be addressed.
Academic Editor: Christine Wandrey
Received: 15 January 2015 / Revised: 23 March 2015 / Accepted: 10 April 2015 / Published: 16 April 2015
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Abstract

Castor oil-based polyurethane as a renewable resource polymer has been synthesized for application as a host in polymer electrolyte for electrochemical devices. The polyurethane was added with LiI and NaI in different wt% to form a film of polymer electrolytes. The films were characterized by using attenuated total reflectance-Fourier transform infrared spectroscopy, dynamic mechanical analysis, electrochemical impedance spectroscopy, linear sweep voltammetry and transference number measurement. The highest conductivity of 1.42 × 10−6 S cm−1 was achieved with the addition of 30 wt% LiI and 4.28 × 10−7 S·cm−1 upon addition of 30 wt% NaI at room temperature. The temperature dependence conductivity plot indicated that both systems obeyed Arrhenius law. The activation energy for the PU-LiI and PU-NaI systems were 0.13 and 0.22 eV. Glass transition temperature of the synthesized polyurethane decreased from −15.8 °C to ~ −26 to −28 °C upon salts addition. These characterizations exhibited the castor oil-based polyurethane polymer electrolytes have potential to be used as alternative membrane for electrochemical devices. View Full-Text
Keywords: castor oil; polyol; polyurethane; polymer electrolytes castor oil; polyol; polyurethane; polymer electrolytes
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Ibrahim, S.; Ahmad, A.; Mohamed, N.S. Characterization of Novel Castor Oil-Based Polyurethane Polymer Electrolytes. Polymers 2015, 7, 747-759.

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